Purple dye was extremely hard to come by and only attainable for the very powerful
The bombing of Pearl Harbor was a turning point in the war because it was one of the events that led the the United States joining the war. As we all know, the US is a superpower, so they have the resources necessary to shift the war into the Allies' favor.
I would say its President Franklin Delano Roosevelt with the New Deal. (I may be incorrect)
The repeated cases of deaths while texting and driving has influenced the creation of a law against texting and driving. Same with drunk driving.
Hitler’s actions created a Social no-no for nazis.
Martin Luther king jr influenced daily life, we are no longer segregated based on life.
Obama’s actions are inflicting trumps actions to undo everything obama did.
Stone wall riots and protesting got congress to legalize gay marriage in all 50 states.
Repeated deaths and invalid imprisonments lead to Americans not being able to go to North Korea.